Rim for pneumatic tires



l. T. DICKINSONi mm Fon PNEuMATlcJxREs. APPLICATION man 1 uLY29. 192i.1,413,834. Patented M1225, 1922.

2 SHEETS-SHEET n.

J. T. DICKINSON.- RIM FOR PNEUMAUC TIRES- APPucATloN FILED 1uLY29, 1921.

2 SHEETS-SHEET 2 lnliiadi@ 31a/vanto@ UNITED srarrs JOHN 'riiontasDIoKIivsoiv,l or DANVILLE, nniivois.

RIM non P'ivriuiuAtrio TIRES;

Application! filed .Tulyl 29,

' which a tube may be'insertedf without reinoving the casing from therim.

An object of the invention is the provision of a rim adapted to receivea tube in which the ends are closed but not joined to permit the tube tobe inserted in the casing while the casing is on the rim.

A further object is the provision of a tube of reduced cross section,when deflated, to facilitate introduction of thetube into the casing.

A. further object is the provision of a rim having an opening throughwhich the tube may he inserted in the tire.

In the accompanying drawings, I have shown one embodiment of theinvention. In this showing:

Figure 1 is a side elevation of a wheel showing the invention applied,parts being shown in section,

Figure 2 is a detail perspective view,

Fi re 3 is a transverse sectional Viewl on line gi?) of Figure l,

Figure et is a plan view of a portion of a rim Y Figure 5 is a detailsectional view on line 5 5 of Figure 4, y

Figure 6 is a detail sectional view ofa portion of the casing and tube,

Figure 7 is a detail perspective view of a portion of the tube, and, a

Figure 8 is a detail sectional view of the rim, casing, and tube showingthe position of the valve'stem.

Referring to the drawings, the reference numeral 1 designates the hub ofa wheel having a rim 2 connected thereto means of spokes 3. The rim isprovided with flanges 4, adapted to engage beads 5 formed on the sidesof a tire casing. The construction heretofore described is the usualconstruction and forms no part of the invention, except in thecombination claimed.

In the present disclosure, I have` illustrated a wire wheel in which therim of the vThe usual valve stem 15 vthe catch V10 is unfastened and thespecification of Letters Patent. Patenfdgpr.

1921'. Serialt No; 48875394.

wheel is provided; with the tire receiving flanges. Tlie'rimy isfurtherprovided-with an openingl 7, adapted to lbe covered2 byV a door 8,.connected `to thev riinby anhi'nge `9. As shown, a catch i the hinge and4is'adap'ted toengagei afpin 11 carried: by the doorto retain it inclosed position. Whenra. clincli'ertyp'e tireii's employed, the'beads'of the -t'fire are'cut away, asat 12, (seeFigure') for aE distance equalto the size of the fdoor, and portion is adaptedv to'bearranged beneaththe door to permit insertion of a tube.

The ktube 13, forming a part of the invention, is provided lwith ends 14constructed in any suitable manner and provided with suitablereenforcement. The tube may thus be laid out in a straight rangedwithin-the tire as shown in Figure 1.

v is arranged intermediate the ends of the tube.

Referring to Figure 7 of the drawings,

10, is arranged opposite l this lcut-away line, or it may be arwhenthetube is manufactured, it is proi -tween thev crease 16 and the valvestem,

IVhen deflated, the tube will occupy the position shown in full lines inFigure 7 of the drawings, thus reducing its cross-section andfacilitatino' insertion of the tube within the casing. When the tube isinflated, it assumes a circular cross-section, as shown at 18 in dottedlines. The free edge of. the door is provided with ceptionk of the valvestem.

In operation, when a tube is to be changed, door opened. The old tube isthen withdrawn from the casing, and a new tube inserted by feeding theends of the tube through the door in opposite directions IVhen the tubehas a .slot 19 for the rel' trated `a vwire wheel and a clincher tire.

Where straight side tires are employed, itis unnecessaryto cut outportions of the bead,

as at 12, as in normal position,the,beads of the tire are spacedsufliciently to permit the tube to be inserted through the door. When ademountable rim is employed, the rim may be provided withv an openingkandthe tube. removed afterthe rim has beenl removedy `from the wheel, orregistering openings may be formed in both the elly and the rim. ln

an ordinary wooden wheel of the clincher rim type, the construction isof course5 the same as in the wire wheel construction.

It is to be understood that the form'o my' invention herewith shown anddescribed is to be takenas a preferred example of the saine, and thatvarious `changes in the shape,

tire casing thereon and being further provided witli an opening for theinsertion of a tire tube7 a hinged door closing said opening, the freeedge of the door being provided with a recess for the reception of thevalve stem of the tire tube, and means for retaining said door in closedposition.

2. A rim for pneumatic tires, said rim being provided with means forretaining a tire casing thereon and being further proby saidldoor andarranged near the free` edge. said pin being provided with an enlargedhead, and a locking member pivotally mounted on said rim and adapted toengage said pin beneath said head.

In testimony whereof I aHiX my signature in presence of two witnesses.

. JOHN THOMAS DICKINSGN.

Witnesses WM. B. MURRAY, J. A.. DONALDSON.

